1 The problems faced by the company are being resolved. I'll look at these in detail in a moment.

→ The problems faced by the company, which I'll look at in detail in a moment, are being resolved.

2She was greatly influenced by her farther. she adored him

→ She was greatly influenced by her father, who/ whom she adored

3Parents are being asked to take part in the survey. their children are between four and six
→ Parents whose children are between four and six are being asked to take part in the survey.

4The Roman coins are now on display in the National Museum. a local farmer came across them in a field

→ The Roman coins, which a local farmer came across in a field, are now on display in the National Museum.

5 He pointed to the stairs. (they led down to the cellar)

→ He pointed to the stairs which/that led down to the cellar.

6 These drugs have been withdraw from sale. they are used to treat stomatch ulcers
→ These drugs, which are used to treat stomatch ulcers, have been withdraw from sale.